I drove over 1500 miles this week on a trip. I started to pick up K-band fairly far down the road. When I got to the signal it was a "one lane bridge" which wasn't a bridge at all, just a place the highway had been narrowed to one lane. Each side had a stoplight and was a seperate bogey on my V1. My guess is the motion sensors that operate the stop lights were running on K-band.
Anyway I had a great trip and was picking up Texas DPS troopers at great distances. Big L mode worked great and I never even had a close call.
I did experience the Ka then Junk reading when it was actually a cop.